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Aruba CX6200F and AP-515 = Power cutoff

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  • 1.  Aruba CX6200F and AP-515 = Power cutoff

    Posted Dec 05, 2022 12:43 PM

    Hi, we have an environment with Aruba CX6200F switches and Aruba AP-515: we get often some AP disconnections due to power cut-off.
    We already tried to change the port configuration and allocate the power by class but this seems not working. Here there is the output of a "sh power brief" for a single port and the related configuration. Maybe some other parameters are missing? Any suggestions would be very appreciated

    Thanks



  • 2.  RE: Aruba CX6200F and AP-515 = Power cutoff

    EMPLOYEE
    Posted Dec 05, 2022 05:31 PM
    perhaps you can add poe priority
    "poe-priority high"
    and enable Intelligent Power Monitoring (IPM) on the AP-515
    https://www.arubanetworks.com/techdocs/ArubaOS_8.8.0_Web_Help/Content/arubaos-solutions/access-points/ipm.htm


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    If my post was useful accept solution and/or give kudos.
    Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
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  • 3.  RE: Aruba CX6200F and AP-515 = Power cutoff

    Posted Dec 07, 2022 03:43 AM
    Thanks for your help ariyap, I tried to change priority to high but reboots still happen :(
    APs are managed by different company, IPM should be enabled at the MC level


  • 4.  RE: Aruba CX6200F and AP-515 = Power cutoff

    EMPLOYEE
    Posted Dec 07, 2022 04:30 AM
    are you sure you are not running out of PoE ?
    how many poe devices are connected to this switch?
    whats the poe power budget for this switch
    what does log -r show you?

    ------------------------------
    If my post was useful accept solution and/or give kudos.
    Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
    ------------------------------



  • 5.  RE: Aruba CX6200F and AP-515 = Power cutoff

    Posted Dec 07, 2022 02:10 PM
    Yes, we still have available budget on switches (below an example). We've an average of 15 APs connected to these switches

    Logging output for a specific Cutoff event is just like this one:


    2022-12-05T07:50:48.803339+00:00 CX6200F hpe-mstpd[3030]: Event|2012|LOG_INFO|CDTR|1|CIST - Topology Change generated on port 1/1/45 going in to forwarding
    2022-12-05T07:50:48.777680+00:00 CX6200F intfd[671]: Event|403|LOG_INFO|UKWN|1|Link status for interface 1/1/45 is up
    2022-12-05T07:50:14.521275+00:00 CX6200F poe-hald[3021]: Event|7902|LOG_INFO|CDTR|1|Powered device power delivery on interface 1/1/45
    2022-12-05T07:50:14.519897+00:00 CX6200F poe-protod[3020]: Event|7901|LOG_INFO|CDTR|1|Detected powered device on interface 1/1/45. Type:2, Class:4
    2022-12-05T07:50:11.878708+00:00 CX6200F intfd[671]: Event|404|LOG_INFO|UKWN|1|Link status for interface 1/1/45 is down
    2022-12-05T07:50:11.472496+00:00 CX6200F poe-hald[3021]: Event|7904|LOG_WARN|CDTR|1|Powered device fault on interface 1/1/45. Fault type Current/Power Cutoff (Icut)


    Thanks again for your help :)



  • 6.  RE: Aruba CX6200F and AP-515 = Power cutoff

    MVP GURU
    Posted Dec 07, 2022 03:19 PM
    That "Fault type Current/Power Cutoff (Icut)" warning log looks quite interesting.





  • 7.  RE: Aruba CX6200F and AP-515 = Power cutoff
    Best Answer

    EMPLOYEE
    Posted Dec 07, 2022 04:53 PM
    that error message indicates that the PD is asking for more power than based on the detected.
    try this on the interface " lldp dot3 poe disable"


    ------------------------------
    If my post was useful accept solution and/or give kudos.
    Any opinions expressed here are solely my own and not necessarily that of HPE or Aruba.
    ------------------------------



  • 8.  RE: Aruba CX6200F and AP-515 = Power cutoff

    Posted Dec 08, 2022 05:07 AM
    Thanks for your suggestion, I tried to apply this command to a single switch. From a new "sh power bri" output now I can see that only the column Allocate Act changed from lldp-dot3 to class (despite PSE reserved power is always fixed at 30W)


    I'll have a look now at the APs behaviour, it's maybe possible that lldp advertisements have priority on PoE allocate-by class command?

    Thanks again


  • 9.  RE: Aruba CX6200F and AP-515 = Power cutoff

    Posted Jan 05, 2023 12:08 AM
    Did this solve the problem? Will make the exakt same setup in a couple of weeks with 6200F and AP-515...


  • 10.  RE: Aruba CX6200F and AP-515 = Power cutoff

    Posted Jan 10, 2023 10:44 AM
    Yes Tomahu, it was definetely solved :)


  • 11.  RE: Aruba CX6200F and AP-515 = Power cutoff

    Posted Jan 20, 2023 10:00 AM

    Hm..

    It still look strange..

    In my 2930F/AP-515 env. it looks like this; and with only change from Class > Usage:

    Meaning, it should not state : Reserved 30W, which will confuse the power calculation in the switch.

    (the LLDP PSE Allocated Power Value, in AO-S 16.11.0005, is 25.5W. (not 30!))

    As seen about, the "reserved" / "drawn" ratios is the same.. almost..

    The datasheet for AP-515, states:

    •  Maximum (worst-case) power consumption:

    - PoE powered (802.3af, IPM enabled): 13.5W

    - PoE powered (802.3at/bt): 20.8W

    Tip:

    Setting all ports to Priority : High, gives no meaning, (there is none Low to deprioritize J)

    (Which will be the same if you set they all, to Low/High/Critical)

    And, enable IPM, and disable USB, once and for all.. you never will utilize it.

    Finally, if you still use your setting, set at least: power-over-ethernet threshold 99

    to avoid tedious alarm warnings..



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    Steinar
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  • 12.  RE: Aruba CX6200F and AP-515 = Power cutoff

    Posted Jan 24, 2023 10:28 AM

    In my 6300/Ap-515 env, I have "test" various setting, none flag raised.

    All same ssid with IPM

    Looks like Alloc-by: usage, and PSE Assigned : Class 3 , gives best power allocation, (third test, from top)



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    Steinar
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